header {
position: absolute;
top: 5px;
left: 5px;
margin:10px;
width:30%;
height:20%;

}




nav {
font-family:Verdana, sans-serif;
font-size:large;
position: absolute;
top: 150px;
float : left;
left: 0px;
margin:10px;
width:25%;


}


article {
font-family:Verdana, sans-serif;
font-size:16px;
position: absolute;
top : 50px;
float : left;
left :30%;
right : 5% ;

}


nav a {
display: block;
text-decoration: none;
color:black;
background-color: #d7b52f ;
width:180px;
height:25px;
margin-bottom:10px;
padding-top:5px;
padding-left:7px;

-moz-border-radius: 15px;
-webkit-border-radius: 15px;
-khtml-border-radius: 15px;

border : 1px solid black ;

}

nav a:hover {
color: yellow;
background-color:#263171;
}

nav a:active {
color:red;
}



.Titre {
font-size :1.5em;
font-weight: 200;
color :#263171;
}